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<?php
/**
* ownCloud
*
* @author Tom Needham
* @copyright 2012 Tom Needham tom@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* provides methods to add and access data from the migration
*/
class OC_Migration_Content{
private $zip=false;
// Holds the database object
private $db=null;
// Holds an array of tmpfiles to delete after zip creation
private $tmpfiles=array();
/**
* sets up the
* @param ZipArchive $zip ZipArchive object
* @param object $db a database object (required for exporttype user)
* @return bool|null
*/
public function __construct( $zip, $db=null ) {
$this->zip = $zip;
$this->db = $db;
}
/**
* prepares the db
* @param string $query the sql query to prepare
*/
public function prepare( $query ) {
// Only add database to tmpfiles if actually used
if( !is_null( $this->db ) ) {
// Get db path
$db = $this->db->getDatabase();
if(!in_array($db, $this->tmpfiles)) {
$this->tmpfiles[] = $db;
}
}
// Optimize the query
$query = $this->processQuery( $query );
// Optimize the query
$query = $this->db->prepare( $query );
$query = new OC_DB_StatementWrapper($query, false);
return $query;
}
/**
* processes the db query
* @param string $query the query to process
* @return string of processed query
*/
private function processQuery( $query ) {
$query = str_replace( '`', '\'', $query );
$query = str_replace( 'NOW()', 'datetime(\'now\')', $query );
$query = str_replace( 'now()', 'datetime(\'now\')', $query );
// remove table prefixes
$query = str_replace( '*PREFIX*', '', $query );
return $query;
}
/**
* copys rows to migration.db from the main database
* @param array $options array of options.
* @return bool
*/
public function copyRows( $options ) {
if( !array_key_exists( 'table', $options ) ) {
return false;
}
$return = array();
// Need to include 'where' in the query?
if( array_key_exists( 'matchval', $options ) && array_key_exists( 'matchcol', $options ) ) {
// If only one matchval, create an array
if(!is_array($options['matchval'])) {
$options['matchval'] = array( $options['matchval'] );
}
foreach( $options['matchval'] as $matchval ) {
// Run the query for this match value (where x = y value)
$sql = 'SELECT * FROM `*PREFIX*' . $options['table'] . '` WHERE `' . $options['matchcol'] . '` = ?';
$query = OC_DB::prepare( $sql );
$results = $query->execute( array( $matchval ) );
$newreturns = $this->insertData( $results, $options );
$return = array_merge( $return, $newreturns );
}
} else {
// Just get everything
$sql = 'SELECT * FROM `*PREFIX*' . $options['table'] . '`';
$query = OC_DB::prepare( $sql );
$results = $query->execute();
$return = $this->insertData( $results, $options );
}
return $return;
}
/**
* saves a sql data set into migration.db
* @param OC_DB_StatementWrapper $data a sql data set returned from self::prepare()->query()
* @param array $options array of copyRows options
* @return void
*/
private function insertData( $data, $options ) {
$return = array();
// Foreach row of data to insert
while( $row = $data->fetchRow() ) {
// Now save all this to the migration.db
foreach($row as $field=>$value) {
$fields[] = $field;
$values[] = $value;
}
// Generate some sql
$sql = "INSERT INTO `" . $options['table'] . '` ( `';
$fieldssql = implode( '`, `', $fields );
$sql .= $fieldssql . "` ) VALUES( ";
$valuessql = substr( str_repeat( '?, ', count( $fields ) ), 0, -2 );
$sql .= $valuessql . " )";
// Make the query
$query = $this->prepare( $sql );
$query->execute( $values );
// Do we need to return some values?
if( array_key_exists( 'idcol', $options ) ) {
// Yes we do
$return[] = $row[$options['idcol']];
} else {
// Take a guess and return the first field :)
$return[] = reset($row);
}
$fields = '';
$values = '';
}
return $return;
}
/**
* adds a directory to the zip object
* @param boolean|string $dir string path of the directory to add
* @param bool $recursive
* @param string $internaldir path of folder to add dir to in zip
* @return bool
*/
public function addDir( $dir, $recursive=true, $internaldir='' ) {
$dirname = basename($dir);
$this->zip->addEmptyDir($internaldir . $dirname);
$internaldir.=$dirname.='/';
if( !file_exists( $dir ) ) {
return false;
}
$dirhandle = opendir($dir);
if(is_resource($dirhandle)) {
while (false !== ( $file = readdir($dirhandle))) {
if (( $file != '.' ) && ( $file != '..' )) {
if (is_dir($dir . '/' . $file) && $recursive) {
$this->addDir($dir . '/' . $file, $recursive, $internaldir);
} elseif (is_file($dir . '/' . $file)) {
$this->zip->addFile($dir . '/' . $file, $internaldir . $file);
}
}
}
closedir($dirhandle);
} else {
OC_Log::write('admin_export', "Was not able to open directory: " . $dir, OC_Log::ERROR);
return false;
}
return true;
}
/**
* adds a file to the zip from a given string
* @param string $data string of data to add
* @param string $path the relative path inside of the zip to save the file to
* @return bool
*/
public function addFromString( $data, $path ) {
// Create a temp file
$file = tempnam( get_temp_dir(). '/', 'oc_export_tmp_' );
$this->tmpfiles[] = $file;
if( !file_put_contents( $file, $data ) ) {
OC_Log::write( 'migation', 'Failed to save data to a temporary file', OC_Log::ERROR );
return false;
}
// Add file to the zip
$this->zip->addFile( $file, $path );
return true;
}
/**
* closes the zip, removes temp files
* @return bool
*/
public function finish() {
if( !$this->zip->close() ) {
OC_Log::write( 'migration',
'Failed to write the zip file with error: '.$this->zip->getStatusString(),
OC_Log::ERROR );
return false;
}
$this->cleanup();
return true;
}
/**
* cleans up after the zip
*/
private function cleanup() {
// Delete tmp files
foreach($this->tmpfiles as $i) {
unlink( $i );
}
}
}
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